There are total 18 hours or 1080 minutes from 7am to 1am. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 1PM to 9PM | 5PM to 7AM | 8PM to 7PM |
| 6PM to 8AM | 10PM to 6PM | 10PM to 7PM |
| 9AM to 6PM | 12PM to 7PM | 8AM to 6PM |
| 3AM to 5AM | 4PM to 7PM | 3PM to 9AM |
| 11PM to 9AM | 2PM to 4PM | 4PM to 1AM |
| 10PM to 4AM | 2AM to 6AM | 5PM to 11AM |
